Material Specification
1,000 tonnes of SHW Clause 803 Type 1 Subbase.

Overview
Raising levels for the Rock carpark extension.

Delivery Partner
Bridge Civil Engineering.

Construction
IBAA (Incinerator Bottom Ash Aggregate) Type 1 subbase was used to raise levels, cover trenches, and form a subbase layer of 240mm under asphalt for access and carpark construction to increase the carpark by 50 spaces. December 2018

Benefit
IBAA is an extremely cost-effective material when compared to Primary Aggregates and BP UK is working towards a verified Carbon Footprint. There are also advantages logistically when using IBAA due to the low density of the material allowing for fewer vehicle movements as this gives volumetric advantages over primary materials

Blue Phoenix now have a CPD, explaining the benefits of IBAA in greater detail, which can be found here.